Drilling jig



Nov. 4, 1947. A. J. MATTIAS T?! AL 2,430,025

' DRILLING JIG Q Filed Nov. 14, 1945 FlG. l..

INVENTORS ANTHONY J. MATTIAS HAROLD J. FISH BYW W ATTORNEY Patented Nov.4, 1947 DRILLING JIG Anthony J. Mattias, Crompton, and Harold J.

- Fish, Nooseneck Hill, R. 1.

Application November 14, 1945, Serial No. 628,634

(Granted under the act of March 3, 1883, as amended April 30, 1928; 3'700. G. 757) Claims.

This invention relates to a device for use in drilling holes throughsheet material and is illustrated herein as embodied in a device foraligning rivet holes.

Where two or more sheets of material must be riveted together, rivetholes drilled in the sheets must be carefully and properly aligned forproper riveting. Where one of the sheets is provided with a hole orseries of holes already drilled, it is diiTicult to drill holes inanother sheet which are correctly aligned with those already drilled,particularly if the sheet having holes already drilled in it ispositioned underneath the second sheet.

Therefore, it is an object of this invention to provide a devicesuitable for locating and drilling holes in one sheet of material inalignment with holes already drilled in another sheet.

Accordingly, this invention provides an aligning device which includes apair of substantially parallel arms, one end of each arm being attachedto an end of the other arm. A pin is mounted at the free end of one armand a guide at the free end of the second arm in spaced coaxial relationwith the pin. When the pin is inserted in an opening already drilled inone sheet of material, the guide is automatically positioned to guide adrill for properly drilling an opening in the other sheet in alignmentwith the hole already present in the first sheet.

With the above and other objects and features in view, the inventionwill now be described with reference to the accompanying drawing whichillustrates a preferred embodiment of the invention and will be pointedout in the claims.

In the drawing:

Fig. 1 is a plan view of an aligning device constructed in accordancewith this invention.

Fig. 2 is a sectional View of the device illustrated in Fig. 1, thesection being taken along the line 2-2 in Fig. 1, two sheets of materialbeing shown in place ready for drilling.

As illustrated in Fig. 2, the device includes a block In to which twosubstantially parallel arms [2 and M are attached by a series of rivetsit. The arm l2 may be made of rigid material but the arm I4 isconstructed of resilient material to permit it to be bent toward or awayfrom the arm l2. A pin I8 is firmly attached to the free end of the armI at a right angle thereto. To the free end of the arm I2 is attached aguide or drill jig 20 having an opening 2| mounted coaxially with thepin l8 and constructed to receive a drill 22.

Two sheets of material 24 and 26 are shown, the sheet 24 having a hole28 into which the pin I 8 fits. The sheets are held firmly in theirrelative position by fastening means not shown. When the aligning deviceis to be used, the pin I8 is inserted in the hole 28. Then, since theopening 2i in the jig 20 is mounted coaxially with the pin 18, itautomatically is set in position for drilling an opening in the sheet 26in alignment with the opening already present in the sheet 24. Theopening 2| may be used to guide a drill during drilling, or it may beused simply as a guide for marking the sheet 26 at the proper place fordrilling, and the device may be removed during the drilling operation.

The invention described herein may be manufactured and used by or forthe Government of the United States of America for government purposeswithout the payment of any royalty thereon or therefor.

Having described the invention what is claimed as novel and desired tobe protected by Letters Patent of the United States is:

1. An aligning device comprising a pair of substantially parallel armsone end of each arm being attached to an end of the other arm, a pinmounted at the free end of one arm and a guide mounted at the free endof the second arm having an opening in spaced coaxial relation with saidpin, said pin and said guide being directed inwardly toward each other.

2. A device in accordance with claim 1 wherein one of said arms isconstructed of resilient material.

3. An aligning device comprising first and second spaced substantiallyparallel arms joined at one end thereof, a pin mounted at the free endof the first of said arms and inwardly directed toward the free end ofthe second of said arms, a guide mounted on the free end of the secondof said arms and inwardly directed toward said pin, said guide having anopening therein coaxial with said pin, whereby said free ends areadapted to embrace a plurality of work members between said pin and saidguide.

4. In a device in accordance with claim 3, wherei in at least one ofsaid arms is constructed of resilient material adapted to permitengagement of said pin and said guide.

5. An aligning device comprising a substantially U-shaped structureresilient at least in part, a guide and a pin mounted on the opposedfree ends of said structure and inwardly directed toward each other,said guide being formed with an opening substantially in coaxialrelation with said pin, said U-shaped structure being adapted to embracemembers of variable thickness between said guide and said pin.

ANTHONY J. MATTIAS. HAROLD J. FISH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date Dzus May 2, 1944 Beard Sept. 4, 1945Number

